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<head>
    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script type="text/javascript">
     // 1.将数组map，filter，reduce，every改写成箭头函数形式
        const arr = [1, 2, 3, 4, 5, 6]

// const arr1 = arr.map(
//     function (element) {
//         return element + 1
//     }
// )
// console.log(arr1);
const aa = arr.map (Element =>{
      return Element+1
    }
)
console.log(aa);


// const new_arr = arr.filter(
//     function (e){
//         return e%2==0  //true：返回 false：不符合条件=>过滤
//     }
// )
const namearr = arr.filter(e =>{
        return e%2==0  
   }
)
console.log(namearr);

// var sum = arr.reduceRight(
//     function (v1,v2){
//         return v1*v2
//     }
// )
var cc =arr.reduceRight((v1,v2) =>{
    return v1*v2
}
)
 console.log(cc);



// var isMatch = arr.every(
//     function (e){
//         return e>1
//     }
// )
var bb =arr.every (e=>{
        return e>1
    }
)
console.log(bb);
    </script>
</body>
</html>